Finding the Third Proportional to 20,488 and 30,590

Step by Step Solution

1. Step 1: Write the proportion equation
   20,488 : 30,590 = 30,590 : x
2. Step 2: Convert to fraction form
   20,488/30,590 = 30,590/x
3. Step 3: Cross multiply
   20,488x = 30,590 × 30,590
4. Step 4: Simplify right side
   20,488x = 935,748,100
5. Step 5: Solve for x
   x = 935,748,100/20,488
6. Step 6: Final answer
   x = 45,672.98